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This 13coil spring is meant for use in STI/SVI magazines up to 170mm
ISMI rods are machined from stainless steel
Individual weights are 6
Designed for use with ISMI’s single flatwire springs
These mag springs are designed to take less initial “set” in order to provide greater load and longevity to ensure reliable ammo feeding
Glock Plus 5 and Up Magazine Spring Hellcat Pro This 13coil spring is meantManufactured of Chrome Silicon alloy. These mag springs are designed to take less initial set in order to provide greater load and longevity to ensure reliable ammo feeding. This 14coil mag spring is for use in plus 5 and above 170mm length magazines. Part#: GL2